The waterproof cuticle covering the epidermis of land plants helps prevent dehydration, much like the skin of some land animals. As a consequence of having a cuticle, what other evolutionary adaptation was important for most land plants?
A. Root hairs on the root epidermis
B. Stomata in the leaves
C. Trichomes on leaf surfaces
D. The endodermis in the root
E. Collenchyma fibers just beneath the surface of the epidermis
Answer: B
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Which developmental events are accurately placed in the following timeline? (Check all that apply.)
_____ after 6 days -- implantation _____ after 1 week -- gastrulation _____ after 2 weeks -- neurulation _____ after 3 months -- organogenesis _____ 266 days -- birth
If a cell had a damaged central vacuole, it would have difficulty performing what function?
A) Storing water B) Converting light energy into food molecules C) Converting food energy into cellular energy D) Assembling lipids
The phase of the cell cycle that corresponds to the interval between mitosis and initiation of DNA replication is referred to as the
a. M phase. b. S phase. c. G1 phase. d. G2 phase.
Which of the following contains indigestible fiber, mucus, and dead microorganisms that are eliminated from the body?
A) Ghrelin B) Pancreatic juice C) Bile D) Chyme E) Feces